The findings were presented in a statement issued by the Tax Authority, outlining its activities in tax inspections, revenue collection and monitoring of mining and petroleum operations during the first nine months of the year.
According to the institution, the audits were conducted with technical assistance from consultants working under the Efficient Taxation for Inclusive Development (TEDI) project and the African Tax Administration Forum (ATAF), as part of efforts to strengthen fiscal oversight of companies operating in the country's natural resources sector.
The amount identified through the audits represents tax liabilities assessed by the authorities and does not necessarily mean that the entire sum has already been collected.
Regarding revenue from megaprojects, the petroleum sector was the largest contributor, generating approximately €154.5 million, while mining activities accounted for around €34.5 million.
According to the Tax Authority, the 84% increase compared with the same period in 2025 was mainly driven by the performance of the petroleum sector, which accounted for the largest share of megaproject revenue.
Meanwhile, revenue from taxes specifically levied on extractive activities rose by 103% compared with the first nine months of the previous year.
Within this category, the mining sector accounted for approximately 86% of the revenue collected, while the petroleum sector contributed the remaining 14%.
Inspections Cover 30 Mining and Petroleum Projects
As part of its efforts to strengthen tax compliance monitoring, the Tax Authority conducted inspection visits to 30 mining and petroleum projects across the provinces of Cabo Delgado, Niassa, Nampula and Manica.
The inspections were aimed at monitoring company operations, assessing compliance with tax obligations and improving oversight mechanisms within the extractive industry.
The institution also monitored transactions involving the transfer of interests in mining and petroleum assets, identifying capital gains valued at approximately €3.8 million, alongside an additional amount equivalent to €1.1 million.
Another highlight of the report concerns the sale of precious stones. Between January and July, the Tax Authority monitored three international ruby auctions, which generated approximately €71.8 million in sales.
According to the figures released, these transactions resulted in approximately €6.9 million in Mining Production Tax (IPM), highlighting the contribution of ruby extraction and trading activities to government tax revenue.
In addition to its inspection activities, the Tax Authority carried out technical training programmes, specialised studies and initiatives aimed at reviewing the tax legislation governing extractive industries.
These measures are intended to strengthen inspection capabilities, improve the identification of tax risks and ensure more effective monitoring of mining and petroleum companies.
The results presented by the institution highlight the increase in tax revenue from megaprojects and the strengthening of oversight activities in a sector that continues to play an important role in generating public revenue and financing government expenditure.